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Journal ArticleDOI

Estimation of MPP of a Double Diode Model PV Module From Explicit I–V Characteristic

01 Sep 2019-IEEE Transactions on Industrial Electronics (Institute of Electrical and Electronics Engineers (IEEE))-Vol. 66, Iss: 9, pp 7032-7042
TL;DR: A new method is proposed for the estimation of maximum power point (MPP) of a DDM PV module using the explicit I–V expression of a PV module under uniform irradiance condition and the accuracy of the explicit expression is verified considering three different PV modules.
Abstract: This paper presents a novel approach for the conversion of an implicit current–voltage (I–V) expression of a double diode model (DDM) photovoltaic (PV) module to an explicit expression of current in terms of voltage. A new method is proposed for the estimation of maximum power point (MPP) of a DDM PV module using the explicit I–V expression of a PV module under uniform irradiance condition. Further, a new mathematical model of a partially shaded PV array is developed using the proposed explicit expression. Since the explicit I–V expression is used for the estimation of MPP of a DDM PV module under uniform and nonuniform irradiance conditions, the estimation of MPP is simple, accurate, and efficient. The accuracy of the explicit expression is verified considering three different PV modules. A comparison of MPP of a DDM PV module extracted using the proposed method with different existing methods under different environmental conditions (DECs) is presented. The results obtained using the proposed method are validated with the experimental results under DEC. Also, the accuracy of the estimated global MPP of a PV array under partial shading conditions is verified.
Citations
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Journal ArticleDOI
TL;DR: Improvements in the tacking time of up to 45% and efficiency greater than 99.9% has been observed in the proposed technique and oscillations have been reduced to as low as 1 W along with extreme reduction in power loss as well.

37 citations

Journal ArticleDOI
TL;DR: A mathematical modeling approach is derived to simulate overlapped PV modules and a comprehensive study and analysis is provided for the effect of overlapped bypass diodes on the electrical response of PV module under a wide variety of possible shading levels to fully understand their effects and impact.
Abstract: Bypass diodes are usually connected in PV modules to reduce the impact of partial shading. There are two configurations of the bypass diodes used in commercially available PV modules: non-overlapping bypass diodes, in which each diode is separately connected to a unique group of series PV cells, and overlapping bypass diodes, in which the diodes are connected to mutual PV cells. Because almost all PV studies are based on non-overlapping configuration, the effects of the diodes are well understood. On the other hand, a complete analysis for the effects of the overlapped bypass diodes on the performance of the PV module has not been yet systematically disclosed. Moreover, there is still no available mathematical formulation to model such PV modules without the use of circuit simulations. This paper first derives a mathematical modeling approach to simulate overlapped PV modules and then provides a comprehensive study and analysis for the effect of overlapped bypass diodes on the electrical response of PV module under a wide variety of possible shading levels to fully understand their effects and impact. Moreover, it reveals their effects on partial shading power losses, and on the hot spot formation, which both have not yet been investigated in the literature of overlapped PV modules. Their possible negative effects on the efficiency of micro inverters are also illustrated. The results are validated both using Matlab Simulink and experimentally.

25 citations


Cites background from "Estimation of MPP of a Double Diode..."

  • ...A variety of PV models are reported in the literature [31]–[35], where the single diode and double diodes PV models are typically used....

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Journal ArticleDOI
TL;DR: A novel CPG control with the rapid approach to LPPs is proposed with the estimation of maximum power point (MPP), which guarantees fast converging speed in response to rapid changes in environmental conditions and low power oscillations for the steady state.
Abstract: Photovoltaic (PV) constant power generation (CPG) control is regarded as an advanced active power control by limiting the maximum feed-in power in order to avoid the adverse impacts of high-penetration PV systems such as overloading and overvoltage. Conventional CPG strategies show obvious limitations in terms of the dynamics response, oscillations during the steady state, and the estimation speed of limited power points (LPPs). In this article, a novel CPG control with the rapid approach to LPPs is proposed with the estimation of maximum power point (MPP), which guarantees fast converging speed in response to rapid changes in environmental conditions and low power oscillations for the steady state. Specifically, the proposed control allocates the operating point at the left-hand side of the MPP, which can not only avoid the instability issue but also simplify the MPP and LPP estimation according to the single-diode PV equivalent model. Furthermore, based on the estimated available power $P_{\rm avi}$ , the proposed CPG control contributes a direct solution in approaching the region around LPP or MPP, which improves the converging speed under environmental-changing conditions. Thus, regardless of the changes in irradiance or temperature, high-performance and reliable operation are ensured by switching the maximum power point tracking mode and CPG mode smoothly. The proposed control can be directly applied for the existing PV system and no additional hardware devices such as irradiance sensors are required, which is cost effective. A systematic comparison of the proposed control with other advanced CPG strategies was made under various scenarios and the advantages of the proposed control were validated experimentally.

24 citations


Cites methods from "Estimation of MPP of a Double Diode..."

  • ...Based on DDM, an explicit I–V expression is used to estimate Pavi in [19]....

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Journal ArticleDOI
TL;DR: Some of the main models for designing PV/T systems are developed and various configurations of equivalent-circuit models are presented to perform the electrical behavior of PV/t systems.

10 citations

Journal ArticleDOI
TL;DR: The Chaotic Baker Map is proposed to reconfigure the panels in Solar Photo-Voltaic (SPV) Array and augments the output power and minimizes the power loss by dispersing the concentrated shade throughout the array.
Abstract: Shading of photo-voltaic panels is one of most common reason for power reduction in practical scenarios. This also causes multiple maximum peaks, thereby resulting in distortion of characteristic curves. In order to overcome the effect of shading, reconfiguration of panels is essential. In this work, the Chaotic Baker Map is proposed to reconfigure the panels in Solar Photo-Voltaic (SPV) Array. The Chaotic Baker Map, being an image processing technique, relocates the panels in SPV Array which is analogous to relocation of pixels within an image. The proposed approach augments the output power and minimizes the power loss by dispersing the concentrated shade throughout the array. The results of the proposed approach are compared to hitherto known configurations under wide range of shading spectrum for different sizes of SPV Array to support the effectiveness of the proposed approach.

10 citations

References
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Journal ArticleDOI
TL;DR: The many different techniques for maximum power point tracking of photovoltaic (PV) arrays are discussed in this paper, and at least 19 distinct methods have been introduced in the literature, with many variations on implementation.
Abstract: The many different techniques for maximum power point tracking of photovoltaic (PV) arrays are discussed. The techniques are taken from the literature dating back to the earliest methods. It is shown that at least 19 distinct methods have been introduced in the literature, with many variations on implementation. This paper should serve as a convenient reference for future work in PV power generation.

5,022 citations


"Estimation of MPP of a Double Diode..." refers methods in this paper

  • ...In the literature, many methods have been proposed such as direct, indirect, and artificial intelligent method for the estimation of MPP of a PV module [13]....

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Journal ArticleDOI
TL;DR: All algorithms, direct and indirect, can be included in some of the DC/DC converters, Maximum power point trackings (MPPTs), for the stand-alone systems and in this article they are grouped as either direct or nondirect methods.

1,160 citations


"Estimation of MPP of a Double Diode..." refers methods in this paper

  • ...Indirect methods [19] are based on mathematical algorithms and expressions....

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Journal ArticleDOI
TL;DR: In this article, a microprocessor-controlled tracker capable of online voltage and current measurements and programmed with both voltage-based and current-based MPPT algorithms is constructed, where the load of the solar system is either a water pump or a resistance.
Abstract: Detailed theoretical and experimental analyses are presented for the comparison of two simple fast and reliable maximum power point tracking (MPPT) techniques for photovoltaic systems (PV): the voltage-based (VMPPT) and the current-based (CMPPT) approaches. A microprocessor-controlled tracker capable of online voltage and current measurements and programmed with both VMPPT and CMPPT algorithms is constructed. The load of the solar system is either a water pump or a resistance. Simulink facilities are used for simulation and modeling of the novel trackers. The main advantage of this new MPPT, as compared with present trackers, is the elimination of reference (dummy) cells, which results in a more efficient, less expensive, and more reliable PV system.

761 citations


"Estimation of MPP of a Double Diode..." refers methods in this paper

  • ...Fractional short-circuit current (Isc) and fractional open-circuit voltage (Voc) [20] are simple methods among other indirect methods....

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Journal ArticleDOI
TL;DR: A novel maximum-power-point-tracking (MPPT) controller for a photovoltaic (PV) energy conversion system is presented, and a single-stage configuration is implemented, resulting in size and weight reduction and increased efficiency.
Abstract: A novel maximum-power-point-tracking (MPPT) controller for a photovoltaic (PV) energy conversion system is presented. Using the slope of power versus voltage of a PV array, the proposed MPPT controller allows the conversion system to track the maximum power point very rapidly. As opposed to conventional two-stage designs, a single-stage configuration is implemented, resulting in size and weight reduction and increased efficiency. The proposed system acts as a solar generator on sunny days, in addition to working as an active power line conditioner on rainy days. Finally, computer simulations and experimental results demonstrate the superior performance of the proposed technique.

714 citations


"Estimation of MPP of a Double Diode..." refers methods in this paper

  • ...Direct methods [14] and [15] are used to track the MPP of a PV module....

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Journal ArticleDOI
TL;DR: In this paper, an analytical solution for the rapid extraction of single and double-diode model parameters from experimental data is described. And the resulting parameters' values' values are shown to have less than 10 percent error for most solar cells.
Abstract: Analytical solutions for the rapid extraction of single- and double-diode model parameters from experimental data are described. The resulting parameters' values are shown to have less than 10 percent error for most solar cells. Error contours are also illustrated to define the range of validity of these methods.

609 citations


"Estimation of MPP of a Double Diode..." refers background in this paper

  • ...This inaccuracy magnifies at low solar irradiation for representing the cell behavior [4], [5]....

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  • ...The values of diode quality factors are always greater than or equal to one [4], [11], [12]....

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